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Dyfyniad Arddull ChicagoGreer, T. Vernon. Sugar From Belgium, France, and West Germany. Washington: U.S. International trade commission, 1979.
Dyfyniad MLAGreer, T. Vernon. Sugar From Belgium, France, and West Germany. Washington: U.S. International trade commission, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.